|
Title: Up-close view of a frog eye Written by: duddy on Dec 16, 2014 (https://biology-forums.com/gallery/47/4_16_12_14_8_31_17.jpeg) (https://biology-forums.com/index.php?action=gallery;sa=view;id=19596) This is the semi-transparent eyelid of the red-eyed tree frog, Agalychnis Callidryas. Frogs aren't the only creatures with 'third eyelids' that keep their eyes moist without blocking vision completely. Sharks, cats, crocodiles, polar bears and camels have them too. |